Once you start flying big airplanes with 80-inch-plus wingspans, you have to do a little mental recalibration. With the typical . 40 to . 60 2-stroke, glow-powered airplane, we have been conditioned
to equate maximum rpm with maximum power, which is not correct.
With big birds especially, it’s better to take both propeller thrust and
airframe design into consideration to help determine the best power
system. No, I am not going to tell you what size of prop will work best with
your particular model, but this article should help guide you in the right
direction so that you can figure out the best firewall-forward combination.
ProPs and Power for Big Birds
Understanding Power-Loading for Giant-Scale Planes
By Gerry yarrish Photos By DaviD hart & Gerry yarrish